DTC Troubleshooting: P2647 (22) (R18A: M/T)

DTC Troubleshooting: P2647 (22)

DTC P2647:  VTEC System Stuck ON


Special Tools Required
Oil pressure gauge attachment (  07NAJ-P070100)
 

Low pressure gauge (  07406-0070002)
 
Oil pressure hose (  07ZAJ-S5A0200)
 



NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

1.Check the engine oil level.

Is the engine oil level OK?


YES - Go to 2.


NO - Adjust the engine oil to the proper level, then go to 12.


2.Turn the ignition switch ON (II).

3.Clear the DTC with the HDS.

4.Do the VTEC TEST in the INSPECTION MENU with the HDS.

Is the result OK?


YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the EOP sensor, the rocker arm oil control solenoid, and the ECM/PCM.n


NO - Go to 5.

5.Turn the ignition switch OFF.

6.Remove the EOP sensor (A), install the special tools as shown, then install the EOP sensor in the oil pressure gauge attachment (B).

NOTE: Install the sensor in the reverse order of removal with a new O-ring.

 

7.Start the engine. Hold the engine speed at 3,000 rpm (min-1) without load (in Park or neutral) until the radiator fan comes on, then let it idle for 2 minutes.

8.Do the VTEC TEST in the INSPECTION MENU with the HDS.

9.Check the oil pressure.

Does the oil pressure increase to 392 kPa (4.0 kgf/cm2, 56.9 psi)?


YES - Replace the EOP sensor, then go to 10.


NO - Replace the rocker arm oil control valve, then go to 10.


10.Turn the ignition switch OFF.

11.Reconnect all connectors.

12.Turn the ignition switch ON (II).

13.Reset the ECM/PCM with the HDS.

14.Do the ECM/PCM idle learn procedure.

15.Start the engine. Hold the engine speed at 3,000 rpm (min-1) without load (in Park or neutral) until the radiator fan comes on, then let it idle for 2 minutes.

16.Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P2647 is indicated, check for poor connections or loose terminals at the rocker arm oil control solenoid, the EOP sensor, and the ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


NO - Go to 17.

17.Monitor the OBD STATUS for DTC P2647 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?


YES - Troubleshooting is complete.n


NO - If the screen indicates FAILED, check for poor connections or loose terminals at the rocker arm oil control solenoid, the EOP sensor, and the ECM/PCM, then go to 1 and recheck. If the screen indicates NOT COMPLETED, go to 15 and recheck.